class Solution {
    public int findPoisonedDuration(int[] timeSeries, int duration) {
        int ret = 0;
        for(int i = 0; i < timeSeries.length - 1; i++) {
            int x = timeSeries[i + 1] - timeSeries[i];
            if(x < duration) ret += x;
            else ret += duration;
        }
        //最后一次攻击，必然中毒d秒
        ret += duration;
        return ret;
    }
}